High-Performance Ball Nose Cutter in Long Design
This solid carbide 4-flute ball nose cutter is engineered for reliable finishing and medium material removal. The long version offers flexible application possibilities when machining deep pockets and complex 3D contours. Featuring a wear-resistant PVD-TiAlN coating (RT405 grade) and a 30° helix angle, the tool provides smooth cutting action and efficient chip evacuation. Additionally, the centre-cutting capability allows for axial plunging operations.
Suitable materials

Technical data
- Mill Type: Solid Carbide Ball Nose Cutter
- Execution: Long Version
- Cutting Property: Centre Cutting
- Coating: PVD-TiAlN
| Mill Type |
Solid Carbide Ball Nose Cutter |
| Helix Angle |
30° |
| Workpiece Material |
Steel, Stainless Steel, Cast Iron
|
| Processing |
Medium and Finish |
| Lenght |
Long Version |
| Shank |
Cylindrical Shank |
| Flutes |
4 |
| Grade |
RT405: PVD-TIALN-coated high-performance grade for solid carbide milling cutters |
| Packaging unit |
1 Pc |
Dimensions of the Solid Carbide Ball Nose Cutter
|
Item Nr. |
D |
r |
d(h6) |
H |
L |
Z |
Version |
| KFL-Z4-D3.0 RT405 |
2551491 |
3 |
1,5 |
6 |
6 |
75 |
4 |
A |
| KFL-Z4-D4.0 RT405 |
2551492 |
4 |
2 |
6 |
8 |
75 |
4 |
A |
| KFL-Z4-D5.0 RT405 |
2551493 |
5 |
2,5 |
6 |
10 |
75 |
4 |
A |
| KFL-Z4-D6.0 RT405 |
2551494 |
6 |
3 |
6 |
12 |
75 |
4 |
B |
| KFL-Z4-D8.0 RT405 |
2551495 |
8 |
4 |
8 |
16 |
100 |
4 |
B |
| KFL-Z4-D10.0 RT405 |
2551496 |
10 |
5 |
10 |
20 |
100 |
4 |
B |
| KFL-Z4-D12.0 RT405 |
2551497 |
12 |
6 |
12 |
24 |
100 |
4 |
B |
| KFL-Z4-D14.0 RT405 |
2551498 |
14 |
7 |
14 |
28 |
100 |
4 |
B |
| KFL-Z4-D16.0 RT405 |
2551499 |
16 |
8 |
16 |
32 |
150 |
4 |
B |
| KFL-Z4-D20.0 RT405 |
2551500 |
20 |
10 |
20 |
40 |
150 |
4 |
B |
Applications
This milling cutter is specifically designed for medium machining and finishing tasks. It is highly effective in tool and die making, where reaching deep cavities and machining three-dimensional shapes is a common requirement. The centre-cutting geometry also supports precise plunging movements.

Special features
The combination of a long tool body and the RT405 grade makes this cutter a practical choice for deep reach applications. It offers a well-balanced mix of toughness and wear resistance, which is beneficial when maintaining tight tolerances over long machining cycles.